Question

Unit less quantity is - a)Force b)Power c) energy d) Pressure​

Answer 1

Answer:

Well all of them have units :

a. Force - Newton (N)

b. Power - Watt (W)

c. Energy - Joules (J)

d. Pressure - Pascal (Pa)

But Energy can be the answer as it has the unit of Work done.

Answer 2

Answer:

A unit less quantity is the one in which there are no fundamental quantities involved. It doesn't have any unit and hence it doesn't have any dimensions. The dimension is Zero. Examples are, angle, elastic strain, Poisson's ratio etc.